Even a gifted sales person who can effortlessly sell anything can also struggle with self promotion. Some struggle with self-promotion because for some reason or another they can’t objectively see the skills and value they bring to the table. First you need to identify your strengths and weaknesses so you know what aspects of yourself you need to talk about as well as stay away from, then and only then can you promote yourself accurately, confidently and professionally without coming across as arrogant.
When applying for a new career/job it is always important to keep in mind that there are tens if not hundreds of people applying for that same position you are applying for. So it is crucial to make sure that your résumé has no grammatical errors (trust me it happens more than you think) AND it stands out from the crowd, to really catch the readers eye.
A job search could be a process that is long and drawn out, testing your mental fortitude. One may be unemployed or just no longer interested in your current job and itching to leave. Changing your search language and prospective can have a positive mental impact on your outlook. Removing the feeling of desperation from the process of a search for a new career opportunity puts you in control with power, confidence and optimism throughout the process.